Sill
A solid closed-pore foam threshold with a foil coating addresses moisture penetration issues in door and window thresholds, ensuring reliable protection and simplifying sealing, while maintaining durability and appearance.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-08-14
- Publication Date
- 2026-03-12
AI Technical Summary
Existing door and window thresholds with hollow chamber profiles face issues with moisture penetration through screw holes, leading to masonry damage, and achieving a reliable seal is complex and difficult.
A threshold element made of solid closed-pore foam with a foil coating, preventing moisture absorption and penetration, and eliminating the need for sealing caps, while providing protection against abrasion and material aging.
The solid foam structure with a foil coating effectively prevents moisture ingress, ensuring reliable protection of the masonry and simplifying the design by eliminating the need for sealing caps, while offering durability and aesthetic appeal.
Smart Images

Figure EP2025073387_12032026_PF_FP_ABST
Abstract
Description
[0001] MACO Technologie GmbH M29287PWO - Hd / Mm
[0002] FLOOR THRESHOLD
[0003] The present invention relates to a threshold for a door or window, in particular for a sliding door or a sliding window, comprising a threshold element that is intended for direct or indirect attachment to a building structure.
[0004] The sill elements of floor thresholds are typically designed as hollow chamber profiles to save weight while ensuring sufficient stability. A stable floor threshold design is particularly important for large and correspondingly heavy sashes.
[0005] Typically, a threshold element of this type is connected to the building structure, such as a concrete floor, using mounting brackets or similar fasteners. Additional components like strips or transition pieces are often screwed onto the threshold element. Moisture can penetrate the hollow profile through the screw holes. This is problematic because the moisture can then escape into the masonry through the open ends of the hollow profile. To prevent this, the open ends of the hollow profile can be sealed with sealing caps. However, this is relatively complex. Furthermore, achieving a reliable seal, even with sealing caps, is difficult in practice.
[0006] Therefore, efforts are made to prevent moisture from penetrating the masonry at door or window thresholds in a simple and reliable manner. This problem is solved by a threshold with the features of claim 1.
[0007] According to the invention, the threshold element has a solid material profile made of closed-pore foam and a foil coating applied to the solid material profile.
[0008] Due to the solid material, there are no channels in the threshold element that could absorb moisture and conduct it to the masonry. The closed-cell structure of the foam also prevents moisture absorption by the threshold element. Therefore, even via screw connections, no moisture can penetrate the threshold and from there into the masonry. Sealing caps on the ends are unnecessary. The foil coating protects the foam component from abrasion and from material aging caused by sunlight. In particular, the foil coating can offer properties that are difficult or impossible to achieve with closed-cell foam. Furthermore, the foil coating can give the threshold element a specific appearance.
[0009] A threshold according to the invention is particularly suitable for lift-and-slide doors or lift-and-slide windows, in which the sash is lifted for sliding and placed on the threshold to fix a position.
[0010] The foil can extend along the entire length of the solid material profile to ensure optimal protection of the foam.
[0011] A particularly simple design results from the fact that the threshold element consists solely of the solid material profile and the foil covering. However, the threshold element can also include additional components or assemblies, such as attached transition strips.
[0012] The threshold may have a running rail arranged on the threshold element for supporting and / or guiding a sliding sash of the door or window.
[0013] Preferably, the top surface of the solid profile facing the track is completely covered by the foil. This protects the area of the threshold, which is particularly exposed to impacts, dirt, moisture, sunlight, and similar stresses after the sliding door or window is installed. The foam is not visible to the user after the threshold is installed. Preferably, the end faces of the solid profile are not covered by the foil.
[0014] One embodiment of the invention provides that the foil also covers the front surface of the solid material profile adjacent to the top surface and the back surface of the solid material profile opposite the front surface. This further improves the protection of the threshold element. The underside of the threshold element opposite the top surface can remain uncovered.
[0015] The foil can be adhered to the solid material profile, preferably using a layer of acrylate adhesive. This allows for particularly simple manufacturing.
[0016] The film can be multi-layered. According to one embodiment of the invention, the film comprises a base layer, in particular made of polyvinyl chloride (PVC). The base layer can either be the only layer of the film or one of several layers of a multi-layered film. Polyvinyl chloride is easy to mold and yet exhibits comparatively high strength. Furthermore, it is particularly abrasion-resistant, dirt-resistant, and durable. The base layer can be fiber-reinforced to increase its strength.
[0017] According to a specific embodiment of the invention, the film has a top layer made of polymethyl methacrylate (PMMA) or polyvinylidene fluoride (PVDF). This further improves the dirt-repellent effect of the film.
[0018] The film coating can have a thickness of at least 10 pm and at most 300 pm, preferably at least 50 pm and at most 200 pm. This has proven to be particularly advantageous with regard to its wear-reducing effect.
[0019] According to a further embodiment of the invention, the solid profile is made of polyethylene terephthalate foam (PET foam). PET foam is relatively inexpensive and, due to its closed-cell structure, is impermeable to liquids. Thus, the masonry is particularly reliably protected from moisture by the impermeable core of the threshold element.
[0020] A specific embodiment of the invention provides that the solid material profile is made from recycled plastic. This is particularly advantageous with regard to sustainability requirements.
[0021] The invention also relates to a door or window with a threshold and a sash that is movable relative to the threshold, in particular by means of a roller arrangement on the threshold.
[0022] According to the invention, the threshold is designed as described above. In particular, the door or window can be designed as a sliding door or as a sliding window, preferably as a lift-and-slide door or as a lift-and-slide window.
[0023] Further developments of the invention can also be found in the dependent claims, the description and the accompanying drawings.
[0024] The invention is described below by way of example with reference to the drawings.
[0025] Fig. 1 is a schematic representation of a sliding door according to the invention with a threshold according to the invention.
[0026] Fig. 2 shows a cross-section of a threshold according to the invention.
[0027] Fig. 1 shows a sliding door 11, which has a horizontally movable sash 15. The sash 15 comprises a sash frame profile 17 and a glass element 19 held by it. An arrangement of several carriages is provided for moving the sash 15, although this is not visible in Fig. 1. The carriages roll on a track 21 arranged below the sash 15, which is attached to a threshold 25. In principle, the track 21 could also be integrally formed with the threshold 25. The track 21 supports and guides the rollers of the carriages in a generally known manner, so that the sash 15 can be moved along the threshold 25.
[0028] Fig. 2 shows the threshold 25 in a cross-sectional view. A threshold element 31 is provided as a support for the guide rail (not shown in Fig. 2), extending in a longitudinal direction transverse to the plane of the drawing. The threshold element 31 has a solid material profile 33 and a foil coating 65 applied to the solid material profile 33.
[0029] The solid profile 33 is made of closed-cell foam. In particular, it can be a swollen PET foam. For sustainability reasons, the solid profile 33 can be made of recycled PET foam. As shown in Fig. 2, the solid profile 33 is free of cavities. That is, the closed-cell foam forms a compact block.
[0030] The foil 65, viewed in cross-section, encompasses opposing corner regions 37, 39 of the solid profile 33. Preferably, the foil 65 extends along the entire length of the solid profile 33. In this way, both the upper surface 41 of the sleeper element 31 facing the guide rail 21, as well as the front surface 42 and the rear surface 43 of the sleeper element 31, are covered by the foil 65. The foil 65 is bonded to the solid profile 33 by means of a layer of acrylate adhesive (not shown), preferably with full-surface bonding. The thickness of the foil 65 is preferably at least 10 µm and at most 300 µm. The illustration in Fig. 2 is not to scale. Rather, for a clearer representation of the foil 65, its thickness is shown enlarged relative to the thickness of the solid profile 33.In the illustrated embodiment, the underside 44 of the solid material profile 33 is uncovered, although this is not mandatory.
[0031] The foil covering 65 can be multi-layered and, in particular, comprise a base layer made of polyvinyl chloride (PVC). The base layer can, for example, include an adhesive layer on one flat side and a top layer made of a dirt-repellent material such as polymethyl methacrylate (PMMA) or polyvinylidene fluoride (PVDF) on the other flat side. A longitudinal groove 45 is formed on the upper surface 41 of the threshold element 31, into which the guide rail 21 (Fig. 1) is inserted. As shown, the longitudinal groove 45 is also lined by the foil covering 65. However, the longitudinal groove 45 could also be left uncovered by the foil covering 65, for example, if the shape of the longitudinal groove 45 and / or the flexibility of the foil covering 65 does not permit a clean lining.
[0032] The threshold 25 could comprise several solid material profiles 33 made of closed-cell foam, which are connected to one another, in particular glued together. It is preferred that the arrangement and connection of the at least two solid material profiles 33 is selected such that no cavities are formed, but rather the threshold element 31 as a whole forms a solid block or core.
[0033] Furthermore, the foil covering 65 can be formed by several foil pieces or foil elements, for example foil strips. The foil pieces or foil elements can be arranged abutting or overlapping each other, preferably slightly overlapping, or with at least one recess on the solid material profile 33.
[0034] Since the threshold element 31 is not based on a hollow profile construction, even if screws are driven into the threshold element 31, moisture will not spread inside the threshold 25. The closed-cell structure of the material, which neither absorbs nor conducts moisture, is particularly advantageous in this regard. The foam also has the advantage of being relatively lightweight. The comparatively low resistance of the solid profile 33 is compensated for by the durable foil covering 65. Furthermore, the foil covering 65 serves as a decorative element, giving the threshold 25 a desired appearance, such as a wood or aluminum look, at least on the visible side. The foil covering 65 also facilitates the application of a desired color to the threshold element 31.
[0035] The described threshold element 31 is not only suitable for a sliding door 11, but for any doors, gates and windows, for example for revolving doors.
[0036] List of reference symbols:
[0037] 11 sliding door
[0038] 15 wings
[0039] 17 wing frame profile
[0040] 19 glass elements
[0041] 21 Running rail
[0042] 25 Threshold
[0043] 31 Threshold element
[0044] 33 Solid material profile
[0045] 37 Corner area
[0046] 39 Corner area
[0047] 41 Top
[0048] 42 Front
[0049] 43 Back
[0050] 44 Underside
[0051] 45 longitudinal groove
[0052] 65 Foiling
Claims
MACO Technologie GmbH M29287PWO - Hd / Mm Claims 1. Threshold (25) for a door (1 1 ) or a window, in particular for a sliding door or a sliding window, with a threshold element (31) which is intended for direct or indirect attachment to a building structure, wherein the threshold element (31 ) has a solid material profile (33) made of a closed-cell foam and a foil (65) applied to the solid material profile (33).
2. Threshold according to claim 1, with a guide rail (21) arranged on the threshold element (31) for supporting and / or guiding a sliding wing (15) of the door (1 1 ) or the window.
3. Threshold according to claim 2, wherein one upper surface (41) of the solid material profile (33) facing the guide rail (21) is completely covered by the foil (65).
4. Threshold according to claim 3, wherein a front side (42) of the solid material profile (33) adjoining the top side (41) and a rear side (43) of the solid material profile (33) opposite the front side (42) are also covered by the foil (65).
5. Threshold according to one of the preceding claims, wherein the foil (65) is glued onto the solid material profile (33), preferably by means of a layer of an acrylate adhesive.
6. Threshold according to one of the preceding claims, wherein the foil (65) is multilayered.
7. Threshold according to one of the preceding claims, wherein the foil (65) comprises a base layer, in particular made of polyvinyl chloride (PVC).
8. Threshold according to claim 7, wherein the foil (65) comprises a top layer of polymethyl methacrylate (PMMA) or of polyvinylidene fluoride (PVDF).
9. Threshold according to one of the preceding claims, wherein the foil (65) has a thickness of at least 10 pm and at most 300 pm, preferably at least 50 pm and at most 200 pm.
10. Threshold according to one of the preceding claims, wherein the solid material profile (33) is made of a polyethylene terephthalate foam (PET foam).
11. Threshold according to one of the preceding claims, wherein the solid material profile (33) is made of a recycled plastic.
12. Door (11) or window with a sill (25) and a sash (15) which is movable relative to the sill (25), in particular by means of a roller arrangement on the sill (25), wherein the sill (25) is designed according to one of the preceding claims.
Citation Information
Patent Citations
Foamed threshold
EP0828051B1
A sill insulation member
GB2500924A
Prefabricated building element
GB2525032A